Seige Weapons and Artillery

[caravel]

Also is there any way to make Ballistas useful? They do seem to be one of the more pointless units floating around....

I've pondered this in the past and I don't think there is. If you give them a faster rate of fire and lessen the damage from the projectile it's no longer any use against fortifications. If you strengthen it and decrease it's rate of fire you have a weapon that's better against fortifications but doesn't have any advantage over a catapult. Also any adjustments outside certain limits leave the weapon either insanely overpowered or useless. In reality I think the answer to ballistas is outside modding limits (the need to be in batteries of 3 or 4 and should be mobile). If anyone has any input as to how to use improve them I'd like to hear it as well.